Study on strength and durability properties of ternary blended self compacting concrete with fiber

Abstract

The compaction of concrete is one of the prominent factors to be considered to obtain the desired strength of the concrete. The mechanical vibrators are mostly used in the site for compaction of the concrete. But, compactions are not done properly in sites and this affects the strength and durability properties of the concrete. The concrete that flows by its own weight is named as Self-Compacting Concrete (SCC). The flow ability of conventional concrete can be improved by developing or introducing self-compacting concrete. But the cost of SCC is very high due to the high cementitious content and super plasticizer. This high cost can be brought down by using the Supplementary cementitious materials (SCMs). Very fine particle size of these SCMs enables pore refinement in the concrete and subsequently improves both the mechanical and durability properties of the concrete. The ternary blended concrete is produced by combining of two SCMs and substitute in concrete as a partial replacement for the cement. The shortcomings in one of the SCMs can get counteracted by other SCM when they are blended. However, the SCC is a brittle material with low tensile stress and impact strength. To overcome these defects, fibers are added in the concrete. The fibers are the tiny pieces of reinforcing material which in turn can reduce the shrinkage cracks and increases the mechanical properties of the concrete. newline newline newline